Vulnerability · Published Jul 11, 2025 · Assigned by juniper
CVE-2025-30661Junos OS: Low-privileged user can cause script to run as root, leading to privilege escalation
High 7.3
In plain English
A high-severity incorrect permission assignment in Junos OS from Juniper Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).
Official description
An Incorrect Permission Assignment for Critical Resource vulnerability in line card script processing of Juniper Networks Junos OS allows a local, low-privileged user to install scripts to be executed as root, leading to privilege escalation. A local user with access to the local file system can copy a script to the router in a way that will be executed as root, as the system boots. Execution of the script as root can lead to privilege escalation, potentially providing the adversary complete control of the system. This issue only affects specific line cards, such as the MPC10, MPC11, LC4800, LC9600, MX304-LMIC16, SRX4700, and EX9200-15C. This issue affects Junos OS: * from 23.2 before 23.2R2-S4, * from 23.4 before 23.4R2-S5, * from 24.2 before 24.2R2-S1, * from 24.4 before 24.4R1-S3, 24.4R2. This issue does not affect versions prior to 23.1R2.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Juniper Networks | Junos OS | 23.2 – before 23.2R2-S423.4 – before 23.4R2-S524.2 – before 24.2R2-S124.4 – before 24.4R1-S3, 24.4R2 |
Weakness: CWE-732 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
References
- https://supportportal.juniper.net/JSA100057 vendor-advisory
- https://github.com/orangecertcc/security-research/security/advisories/GHSA-2p66-9j7x-fmch third-party-advisory